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A kind of lithium ion battery negative electrode material binder and negative electrode material and lithium battery

A lithium-ion battery and negative electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problem of small specific capacity of the battery and achieve the effect of increasing the specific capacity

Active Publication Date: 2019-08-02
江苏夸父新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the amount of binder used in lithium battery negative electrode materials is relatively low in lithium batteries, its function is to maintain electrode active materials, stabilize the structure of the pole piece, and buffer the expansion and contraction of the pole piece during charging and discharging, which will affect the specific capacity of the battery (including Mass specific capacity and volume specific capacity) have a huge influence. At present, the binder used in lithium-ion batteries is mainly organic fluoropolymer, and the specific capacity of the battery is still small.

Method used

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  • A kind of lithium ion battery negative electrode material binder and negative electrode material and lithium battery
  • A kind of lithium ion battery negative electrode material binder and negative electrode material and lithium battery
  • A kind of lithium ion battery negative electrode material binder and negative electrode material and lithium battery

Examples

Experimental program
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Effect test

specific Embodiment 1

[0026] Step 1: dissolving N-n-propylmaleamide in an organic solvent to form a maleamide solution, and then preheating to between 40-50 degrees Celsius;

[0027] Step 2: Add 1,3-propanedithiol to the solution after step 1, adjust the pH value of the solution between 5-7 with acetic acid, and add an initiator, wherein the initiator uses an existing initiator, such as Azobisisobutyronitrile, azobisisoheptanonitrile, etc.

[0028] Step 3: By raising the temperature to 80 degrees Celsius, stirring the reaction, and maintaining reflux, the reaction is completed when the refractive index is 1.498-1.479;

[0029] Step 4: Cool down to below 60 degrees Celsius, depressurize, remove the solvent until the viscosity is 1.5PA·S, stop the solvent removal, and stir evenly.

specific Embodiment 2

[0031] Step 1: Dissolving N-methylmaleamide in an organic solvent to form a maleamide solution, and then preheating to 40-50 degrees Celsius;

[0032] Step 2: Add n-dodecyl mercaptan to the solution after step 1, adjust the pH value of the solution between 5-7 by acetic acid, and add an initiator, wherein the initiator uses an existing initiator, such as azo Diisobutyronitrile, azobisisoheptanonitrile, etc.

[0033] Step 3: By raising the temperature to 80 degrees Celsius, stirring the reaction, and maintaining reflux, the reaction is completed when the refractive index is 1.498-1.479;

[0034] Step 4: Cool down to below 60 degrees Celsius, depressurize, remove the solvent until the viscosity is 1.5PA·S, stop the solvent removal, and stir evenly.

specific Embodiment 3

[0036] Step 1: Dissolving N-phenylmaleamide in an organic solvent to form a maleamide solution, and then preheating to 40-50 degrees Celsius;

[0037] Step 2: Add 1,9-nonanedithiol to the solution after step 1, adjust the pH value of the solution between 5-7 with acetic acid, and add an initiator, wherein the initiator uses an existing initiator, such as even Azobisisobutyronitrile, azobisisoheptanonitrile, etc.

[0038] Step 3: By raising the temperature to 90 degrees Celsius, stirring the reaction, and maintaining reflux, the reaction is completed when the refractive index is 1.498-1.479;

[0039] Step 4: Cool down to below 60 degrees Celsius, depressurize, remove the solvent until the viscosity is 1.5PA·S, stop the solvent removal, and stir evenly.

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Abstract

The invention discloses a lithium ion battery negative electrode material adhesive, belongs to the field of lithium ion batteries, and aims at solving the problem of poor performance of conventional adhesives. The adhesive is a high-molecular polymer obtained by polymerization of a dithiol monomer and a maleic amide monomer, wherein the dithiol monomer has the structural formula defined in the specification, and the maleic amide monomer has the structural formula defined in the specification, wherein R1 is an organic divalent substituent, and R2 is an univalent substituent.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a binder for negative electrode materials. Background technique [0002] Lithium-ion batteries rely primarily on the movement of lithium ions between the positive and negative electrodes to function. During the charging and discharging process, Li+ intercalates and deintercalates back and forth between the two electrodes: when charging, Li+ is deintercalated from the positive electrode, intercalated into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. Batteries generally use materials containing lithium elements as electrodes, which are representatives of modern high-performance batteries. [0003] Lithium-based batteries are divided into lithium batteries and lithium-ion batteries. Lithium-ion batteries are used in mobile phones and laptops, commonly known as lithium batteries, bu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M10/0525
CPCH01M4/622H01M10/0525Y02E60/10
Inventor 陈福彦
Owner 江苏夸父新材料有限公司